/
version.go
52 lines (44 loc) · 1.67 KB
/
version.go
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// Copyright © 2018 Wolfy-J <wolfy.jd@gmail.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package ffmpeg
import (
"bytes"
"fmt"
"os/exec"
"regexp"
)
// Version returns ffmpeg version in string form
func Version() (string, error) {
cmd := exec.Command("ffmpeg", "-version")
var cmdOut, cmdErr bytes.Buffer
cmd.Stdout, cmd.Stderr = &cmdOut, &cmdErr
if err := cmd.Run(); err != nil {
return "", extractError(err, cmdErr.String())
}
r, err := regexp.Compile(`ffmpeg version ([^ ]+)`)
if err != nil {
return "", err
}
match := r.FindStringSubmatch(cmdOut.String())
if len(match) == 0 {
return "", fmt.Errorf("undefined version")
}
return match[1], nil
}